broker-api-idempotent-cancel-requests SKILL.md skillA
broker-api-idempotent-cancel-requests from himanshuj16/algo-trading-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add himanshuj16/algo-trading-skills/broker-api-idempotent-cancel-requests@v3.0.0Pins v3.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- himanshuj16/algo-trading-skills
- Path
skills/broker-api-idempotent-cancel-requests/SKILL.md- Versions recorded
- 5
- Latest version
- v3.0.0, committed Sep 3, 2026
- First version recorded
- Jul 25, 2026
- Size
- 11,388 bytes
- Repository stars
- 50
- License
- Apache-2.0
Use when cancelling live orders over an unreliable network. De-duplicates cancel retries and separates a cancel the broker acknowledged from one it completed, so a timeout, 5xx or order-not-found is never read as proof the order is dead.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
## When to Use
Invoke this skill when a bot issues order cancel requests over an unreliable network, from
concurrent threads, or in a retry loop. Cancellation carries race conditions that order
placement does not: the matching engine may fill the order microseconds before the cancel
arrives, and a lost response leaves the client unable to tell whether the cancel landed.
The skill exists to enforce one distinction that most cancel code gets wrong:
> **A cancel request is a request, not an outcome.**
Every broker consulted says so in its own words. FIX 4.4 defines `OrdStatus` (tag 39) value
`6` — "Pending Cancel (e.g. result of Order Cancel Request `<F>`)" — as a state *distinct*
from `4` = "Canceled"; only a subsequent `ExecutionReport` (35=8) moves the order to `4`.
Alpaca's `pending_cancel` status is documented as "The order is waiting to be canceled",
and its docs state orders "will remain in `pending_cancel` until canceled by the execution
venue that Alpaca routed the order to for execution" — the `DELETE /v2/orders/{id}` returns
`204` long before that. Zerodha Kite Connect states plainly that "Successful placement of an
…Read the whole file at its exact version.
How to install
mdr add himanshuj16/algo-trading-skills/broker-api-idempotent-cancel-requests@sha256:5f36022aa3b4683fThe line at the top of this page pins the label v3.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_e7zp4o72t7hagq6t)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jul 25, 2026 and Sep 3, 2026, about one every 10 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v3.0.0 latest | 2026-09-03 | 8527a51 | 11,388 B | A | view · diff |
| v3.0.0 | 2026-08-14 | 7eef45d | 11,423 B | A | view · diff |
| v2.0.0 | 2026-08-07 | 89d1436 | 3,625 B | A | view · diff |
| v2.0 | 2026-07-30 | dfc60c7 | 3,623 B | A | view · diff |
| v2.0 | 2026-07-25 | 777afdb | 3,636 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (11388 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
himanshuj16/algo-trading-skills · 50 stars · license Apache-2.0 · pushed 2026-09-14 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_e7zp4o72t7hagq6t GET https://markdownregistry.com/api/v1/resolve?ref=himanshuj16/algo-trading-skills/broker-api-idempotent-cancel-requests GET https://markdownregistry.com/api/v1/blob/5f36022aa3b4683f5ae723bb8f79cf4e7e901346b4abb69a1fa3f43129eed0d7
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.